You are a zombie hunter. Strangely enough this profession has existed for awhile because zombies do exist. Zombie teeth are used in medicine that prolongs life, and of course this medicine is very expensive. You were delighted to find zombies in some old, abandoned buildings. There are no other hunters here, and you need money. Kill as many zombies as possible without getting infected yourself.
Control keys:
F - Pick up weapons, ammo
1,2,3 ... Change weapons
WASD - Character movement
SPACEBAR - Jump
SHIFT - Sprint
Esc - Exit to the menu
LKM - Shoot